Product Comparison

Remove this device from comparison.
Forerunner® 245
$279.99 USD
Buy Now
Remove this device from comparison.
Forerunner® 45
$179.99 USD
Buy Now
Remove this device from comparison.
Forerunner® 55
$199.99 USD
Buy Now

You like running. And you want to take it to the next level with a GPS smartwatch that has the basic metrics and then some.

You need a basic running watch. If you want to keep it simple, this lightweight GPS smartwatch is for you.

You now see yourself as a runner. And you want an easy-to-use GPS smartwatch that encourages running and healthy lifestyles. With the simple press of a button, you can start your run or walk right from your wrist.

General

Lens Material

Corning® Gorilla® Glass 3

chemically strengthened glass

chemically strengthened glass

Bezel Material

fiber-reinforced polymer

Quick Release bands yes (20 mm, Industry standard) yes (20 mm, Industry standard)
Strap material

silicone

silicone

silicone

Physical size

42.3 x 42.3 x 12.2 (mm)

Fits wrists with a circumference of 127-204 mm

42 x 42 x 11.4 mm

Fits wrists with a circumference of 129-197 mm

42 x 42 x 11.6 mm

Fits wrists with a circumference of 126-203 mm

Color display
Display Size 1.2" (30.4 mm) diameter 1.04" (26.3 mm) diameter 1.04" (26.3 mm) diameter
Display Resolution 240 x 240 pixels 208 x 208 pixels 208 x 208 pixels
Display Type sunlight-visible, transflective memory-in-pixel (MIP) sunlight-visible, transflective memory-in-pixel (MIP) sunlight-visible, transflective memory-in-pixel (MIP)
Weight

38.5 g

Small: 32 g
Large: 36 g

37 g

Water rating 5 ATM 5 ATM 5 ATM
Battery life Smartwatch Mode: Up to 7 days
GPS mode: Up to 24 hours
Smartwatch Mode: Up to 7 days
GPS mode: Up to 13 hours

Smartwatch Mode: Up to 2 weeks
GPS mode: Up to 20 hours
See details

Charging method Garmin proprietary plug charger Garmin proprietary plug charger Garmin proprietary plug charger
Memory/History 4 GB 80 hours of activity data 200 hours of activity data

Clock Features

Time/date
GPS Time Sync
Automatic daylight saving time
Alarm clock
Timer
Stopwatch
Sunrise/sunset times

Health Monitoring

Wrist-based heart rate (constant, every second)
Daily resting heart rate
Abnormal heart rate alerts yes (high and low) yes (high and low) yes (high and low)
Respiration rate (24x7)
Pulse Ox blood oxygen saturation yes (spot-check and optionally in sleep)
Fitness age yes (in app) yes (in app)
Body Battery™ energy monitor
All-day stress
Relaxation reminders
Relaxation breathing timer
Sleep yes (advanced) yes (advanced) yes (advanced)
Hydration yes (in Garmin Connect™ and optional Connect IQ™ widget) yes (in Garmin Connect™ and optional Connect IQ™ widget)
Women's health yes (in Garmin Connect™ and optional Connect IQ™ widget)

Sensors

GPS
GLONASS
Galileo
Garmin Elevate™ wrist heart rate monitor
Compass
Accelerometer
Thermometer yes (tempe™ sensor required)
Pulse Ox Blood Oxygen Saturation Monitor

Daily Smart Features

Connectivity Bluetooth®, ANT+® Bluetooth®, ANT+®
Connect IQ™ (downloadable watch faces, data fields, widgets and apps) yes (watch faces only)
Smart Notifications
Text response/reject phone call with text (Android™ only)
Calendar
Weather
Controls smartphone music
Find My Phone
Find My Watch
VIRB® Remote
Smartphone compatibility iPhone® and Android™ iPhone®, Android™ iPhone®, Android™
Pairs with Garmin Connect™ Mobile

Safety and Tracking Features

LiveTrack
Live Event Sharing Android™ Only Android™ Only Android™ Only
Incident Detection during select activities yes (smartphone required)
Incident detection alert on phone for wearables
Assistance yes (smartphone required)

Activity Tracking Features

Step counter
Move bar (displays on device after a period of inactivity; walk for a couple of minutes to reset it)
Auto goal (learns your activity level and assigns a daily step goal)
Calories burned
Distance traveled
Intensity minutes
TrueUp™
Move IQ™
Garmin Connect™ Challenges app yes (optional Connect IQ app)

Gym & Fitness Equipment

Automatic rep counting
Cardio workouts
Available gym activity profiles Strength, Cardio and Elliptical Training, Stair Stepping, Indoor Rowing, Yoga Cardio and Elliptical Training, Stair Stepping. Yoga may be added through app HIIT, Cardio and Elliptical Training, Stair Stepping, Pilates, Yoga
Strength workouts

Training, Planning and Analysis Features

HR zones
HR alerts
HR calories
% HR max
% HRR
Recovery time
Auto max HR
HR broadcast (broadcasts HR data over ANT+™ to paired devices) yes (using ANT+ or BLE)
Respiration rate (during exercise) Yoga and Breathwork only
GPS speed and distance
Customizable data pages
Customizable activity profiles
Auto Pause®
Interval training
Advanced workouts
Downloadable training plans
HRM running pace and distance
Auto Lap®
Manual lap
Configurable lap alerts
VO2 Max (Run)
Training status
Training load
Training effect
Training effect (anaerobic)
Improved recovery time yes (limited)
Daily suggested workouts yes (limited) yes (limited)
Custom alerts
Audio prompts
Finish time
Virtual Partner
Race an Activity
Course guidance
Touch and/or button lock
Auto scroll
Activity history on watch
Physio TrueUp

Running Features

Available run profiles

Running, Outdoor Track Running, Treadmill Running, Indoor Track Running, Trail Running, Virtual Running

Running, Treadmill Running. Indoor Track Running may be added through app

Running, Outdoor Track Running, Treadmill Running, Indoor Track Running, Virtual Running

GPS-based distance, time and pace
Running dynamics yes (with compatible accessory)
Vertical oscillation and ratio yes (with compatible accessory)
Ground contact time and balance yes (with compatible accessory)
Stride length (real time) yes (with compatible accessory)
Cadence (provides real-time number of steps per minute)
Performance condition
PacePro™ Pacing Strategies
Run workouts
Race predictor
Foot pod capable
Run/Walk/Stand detection

Outdoor Recreation

Point-to-point navigation
Bread crumb trail in real time
Back to start
TracBack®
UltraTrac mode
Distance to destination
GPS coordinates
Area calculation yes (via Connect IQ™)
Hunt/fish calendar yes (via Connect IQ™)
Sun and moon information yes (via Connect IQ™)

Cycling Features

Available cycling profiles

Biking, Indoor Biking

Biking. Indoor Biking may be added through app

Biking, Indoor Biking

Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories)
Courses
Race an activity
Compatible with Varia Vision™ (head-mounted display)
Compatible with Varia™ radar (rear-facing radar)
Compatible with Varia™ lights
Speed and cadence sensor support (w/sensor)

Swimming Features

Available swim profiles

Pool Swimming

Pool Swimming

Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories)
Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only)
Drill logging (pool swim only)
Basic rest timer (up from 0) (pool swim only)
"Repeat on" rest timer (pool swim only)
Auto rest (pool swim only)
Time and distance alerts
Countdown start (pool swim only)
Pool swim workouts
Underwater wrist-based heart rate
Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) yes (with HRM-Tri, HRM-Swim, HRM-Pro or HRM-Pro Plus)

Kid Activity Tracking Features

Toe-to-Toe™ Challenges app yes (optional Connect IQ Toe-to-Toe™ Challenges app) yes (optional Connect IQ Toe-to-Toe™ Challenges app)